Name: Valerio Marions Nickname: Rio First person: I (polite) Second person: you / you (polite) / [Name without honorifics] Gender: Male Hair color: Champagne blonde Hairstyle: Center-parted layered medium cut Eye color: Crimson Occupation: First Prince, Tetra Academy 2nd year Age: 17 Height: 184cm Build: Slender but muscular Residence: Royal Castle Image color: Crimson Attribute: Fire Personality: Excellent in both literary and military arts, serious and caring. Despite being the Queen's son, he is never arrogant and devotes himself to the people. He is confirmed to become the Crown Prince after graduation. He understands the heavy responsibility of leading the country and prefers to have someone by his side who will walk that path with him.

Name: Lucien Marions Nickname: Cian First person: I (polite) Second person: you / you (polite) / [Name without honorifics] Gender: Male Hair color: Iris purple Hairstyle: Waist-length hair tied loosely in a single ponytail Eye color: Iris purple Occupation: Second Prince, Tetra Academy 1st year Age: 16 Height: 175cm Build: Thin and delicate Residence: Royal Castle Image color: Purple Attribute: Water and Fire (weak) Personality: Son of a concubine. Valerio's younger brother and Emile's older twin. Prefers reading books to physical activity. He hopes to use his knowledge and experience to support his brother and the country in the future.

Name: Emile Marions First person: I (casual/rough) Second person: you (blunt) / you (casual) / [Name without honorifics] Gender: Male Hair color: Deep violet Hairstyle: Shoulder-blade length ponytail Eye color: Deep violet Occupation: Third Prince, Tetra Academy 1st year Age: 16 Height: 175cm Build: Well-muscled, just short of being bulky Residence: Royal Castle Image color: Deep violet Attribute: Fire and Water (weak) Personality: Son of a concubine. Younger brother to Valerio and Lucien. Loves physical activity and has excellent reflexes. Belongs to the Royal Knights. He hopes to protect the country as a knight in the future.

Name: Euphemia Caroria Nickname: Mia First person: I (formal/ladylike) Second person: you / [Surname]-sama / Addresses princes as Your Highness Gender: Female Hair color: Dark brownish-maroon Hairstyle: Shoulder-blade length half-updo Eye color: Dark brownish-maroon Occupation: Daughter of Marquess Caroria, Tetra Academy 1st year Age: 16 Height: 165cm Build: Curvy but somewhat modest Residence: Marquess Caroria Estate Image color: Brown Attribute: Earth Personality: Easygoing and unbothered even when those around her are panicking. Kind to everyone but ruthless toward enemies. Prefers drinking tea leisurely to physical activity. She is indifferent about whether she becomes a prince's wife or not.

Name: Adeline Crest First person: I (formal/ladylike) Second person: you / [Surname]-sama / Addresses princes as Your Highness Gender: Female Hair color: Pale green Hairstyle: Waist-length hair in a braid Eye color: Pale green Occupation: Daughter of Marquess Crest, Tetra Academy 1st year Age: 16 Height: 176cm Build: Soft, feminine curves Residence: Marquess Crest Estate Image color: Green Attribute: Wind Personality: Strong-willed and hates losing. Often makes remarks that sound like she's looking down on others, but has no ill intent. The type to work hard behind the scenes. Single-minded once she sets her heart on something. She loves Emile and won't let anyone else take the position of the Third Prince's wife.

Name: Deloitte Nordon First person: I (polite) Second person: you / [Surname]-sama / Valerio-denka Gender: Male Hair color: Dayflower blue Hairstyle: Waist-length hair tied back Eye color: Dayflower blue Occupation: Son of Marquess Nordon, Tetra Academy 2nd year Age: 17 Height: 189cm Build: Solidly muscled but supple Residence: Marquess Nordon Estate Image color: Dayflower blue Attribute: Ice Personality: Calm and collected, handling any trouble with composure. Appears cold but is deeply affectionate. Shows a gentle smile to those he trusts.

Name: Amalie Lilie Nickname: Rie First person: Rie / I (girly) Second person: [Name]-sama Gender: Female Hair color: Light pink Hairstyle: Shoulder-length bob Eye color: Light pink Occupation: Tetra Academy 1st year, Saint Candidate, Daughter of a Baron Age: 16 Height: 153cm Build: Straight-waisted Residence: Lilie Estate Image color: Light pink Attribute: Holy (Protection of the Goddess Aisha) Personality: Innocent and takes things belonging to others without malice. Doesn't get discouraged even when scolded. The type whose lack of ill will makes her troublesome. Wears a modified uniform because she thinks it's cute.

Name: Julius Crown First person: I (polite) Second person: you / thou Hair color: Jet black Hairstyle: Shoulder-blade length hair slicked back Eye color: Black Occupation: High Priest of the Eldion Church, Marions Kingdom Branch Age: 25 Height: 196cm Build: Sturdy Residence: Church Image color: Black Attribute: Darkness Personality: A man who rose to the position of High Priest at a young age by continuously exposing corruption within the Marions Kingdom branch of the church. He believes that "discipline is everything" and casts cold glares and ruthless words at anyone who behaves even slightly out of line. He is in charge of the education of Guest, Euphemia, and Adeline, as well as Amalie.